Whoever you order your converter from, make sure it is the RIGHT ONE FOR YOUR CAR.
Just because a converter worked in someone else's application doesn't make it the right one for your car. Any converter builder worth their salt will ask you a lot of questions to do their very best to get one that works in your car. If they don't ask you a lot of questions, then run, don't walk from them. Ask them about warranties, ask about their policy on restalling your converter if required, and what ever you do don't BS them about what is done to your engine, the diff ratio, tire size, and what you're going to be doing with your car most of the time. Give any converter builder the wrong information, and the converter will be WRONG.
Budgets I understand them for sure, but don't let price be your only guide when buying a converter. Guys spend thousands on the engine, and then look for the cheapest converter/transmission setup, why, I've never understood. With the converter/transmission poorly applied, all that horsepower up front is wasted.